The operation of bioreactors
was divided into periods based on the rhamnolipid concentration
used and the results for each period were reported as mean
standard deviation of 8 (period with 45 mg/L of rhamnolipid into
the reactor), 11 (period with 40 mg/L of rhamnolipid into thereactor), 14 (period with 12 mg/L of rhamnolipid in the feed and
periods with 24 and 50 mg/L of rhamnolipid into the reactor), 16
(last period with 50 mg/L of rhamnolipid into the reactor) or 25
(period with 12 mg/L of rhamnolipid into the reactor) data
obtained after 5.5 h of reaction. For each period, the significance
of results was evaluated by the Student’s t test with 95% confidence
level using the Statistica 7.0 software.